Confusing "almost logged in" state

[revolter]

I tried logging in, and something weird happened. Here are some screenshots for context:

Before	After

It told me that the credentials are wrong, but at the same time, somehow, a profile picture and username of mine were displayed.

This means that anyone who knows my email address can type something random for the password and access this information, and I feel like this shouldn't be possible.

[justinclift]

Oh, that's not good. I'll look into it.